79113991 has 8 divisors (see below), whose sum is σ = 87145344. Its totient is φ = 71222520.

The previous prime is 79113977. The next prime is 79114033. The reversal of 79113991 is 19931197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79113991 - 2⁵ = 79113959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79113901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33781 + ... + 36046.

It is an arithmetic number, because the mean of its divisors is an integer number (10893168).

Almost surely, 2^79113991 is an apocalyptic number.

79113991 is a deficient number, since it is larger than the sum of its proper divisors (8031353).

79113991 is a wasteful number, since it uses less digits than its factorization.

79113991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69941.

The product of its digits is 15309, while the sum is 40.

The square root of 79113991 is about 8894.6046005430. The cubic root of 79113991 is about 429.2903220809.

The spelling of 79113991 in words is "seventy-nine million, one hundred thirteen thousand, nine hundred ninety-one".